Sewing-machine.



,F. ASHWORTH.

I SEWING MACHINE. APPLICATION FILED'MAY 24. I913.

Patented July 17, 1917.

6 SHEETS-SHEET 1.

- F. ASHWORTH.

SEWING MACHINE APPLICATION FILED MAY 24. 913. Patented July 17 1917.

6 SHEETS-SHEET 2.

i /iirzessess v N 28 Inventor: a

F. ASHWORTH. SEWING MACHINE.

APPLICATION FILED HAY24. l9l3.

Patent ed July 17, 1917.

6 SHEETS-SHEET 3.

I li zwss'es. [fl/081th)? F. ASHWORTH.

SEWING MACHINE.

APPLICATION FILED, MAY 24. 913- 1,233,539. Patented Jul 17, 1917.

6 SHEETS-SHEET 4.

76 83 0 as 7473/ n 62 [raw/war F. ASHWORTH.

SEWING MACHINE.

APPLICATION FILED MAY 24, I313.

Patented Jul y 17,1917. ETS-SHEE'T 5.

3; e syn:

lltdfwol'! 433/ r. ASHWUHTH.

SEWING MACHINE.

, z aacmou FILED MAY 24. I915.

Patented J m 17, 1917.

esnsafs-suazr 6 To all whomz'tmey concem:

i lowing to be a, full, clear,

esiseee;

time esnworesm on SEVEBLY,

messy.

teins to make and use the semen This invention relates to Wax thread sew- "-ing machines, and morejperticnlerly to out sole shoesewing mechiness f the class employed in sewing the outsole to .the welt ot Welted shoe fireinoved or the Work whichv is One object of the present invention is toprovide shoe sewing meehlnes I with. animproved "presser foot mechanism ,20

the-position which tlfey assume at epoint 'in a cycle of operations when the resser hyovhich with the parts of the machine in foot is normally locked in Work engaging position the presse'r'foot mey be'unloeked end lifted toellow the finished. work'to be ereted on to he adjusted,' end' which will "maintain the presser-foot in an unlocked 7 condition until it has been lowered into en? gegement'with the Work I v .Another Objefitof the inventionis to pro, vicle shoe sewing machines 'w1th improved mechanism for lifting the presser-foot upon at rest aud tor releasing. the presser foot to stopping the machine for holding the presser foot in raised position. while the mach ne'is allow it"to descend upon the work upon starting the machine.

i. A still furtl'ier object of the invention is to provide shoe sewing machines Wlth iinproved mechanism "for bringing the machine;

to .rest ate predetermined point in a cycle of operations without undue shocker jar,

and for raising the pressenfoot; from the Work as the machine comes to rest. Vilith these end other 'olnects in" VIEW, the

, invention contemplates the provision of verione novel :zind. improved features clearly set forth in the fOllOWlDg dQSCflPtlOn and perto ventages of which will loo/obv ous to those ticula ly pointed out in the claims, the as skilled in the art.

In the accompanying drawings illustrating a machine embodyingthe several feet.

mess/e MACHINERY CGMI'ANY, on ne'rneson SEWING-MACHINE.

Specification of Letters E'etent.

of this class being 0. 4

' t me CHUS ETTS, A$SIGNOR 'IO UNITS!) SHOE NEW JERSEY; A CORPORATION OF NEW Patented July 1?, 191?.

hpgilication filed m 24, 1913. Serial No. 769,566.

tures of theinvention in their preferred forms; I

Figure 1 is at-detailed View in side eleva-' hon llustrating particularly the resserfootmechanis F 1g. 2is a, plan view, partly in sect-ion, llustrating particularly the slow speed drivng mechanism and the mechanismfot raisng the res er-foot upon stopping the 1115b chine;

A Fig. 3 isa sectional View taken substantielly on the line 3Z}.of Fig. 2; showing the mechanism shown in Fig. 2, and in addition the presser-foot lever and certain parts associatedl therewith i Fig. 4 is a sectional view taken substantielly on the line H of Fig-.2, showihg. the mechenisin illustrated in Fig. '2, and also the, tension device end the connecting mechenism through which the tension device is actuated to'releese the tension as I the Inachine is brought to rest;

Fig. 5. is a Sectional View taken substantielly on the line 5--5 of Fig. 2. I, Fig 6 is'e view in side elevation of the complete machine. v

The sewingmnchine illustratecl in the drawing is an outsole loekstitch curved hook needle machine substantially the same in general construction, arrangement and mode of operation, as the machine illustrated and; described in apphcztnte Pete-nthlo.1,169,909

Feb. 1', 1916. Inthis application only so much" of the inec-hinehas been illustrated as has been considered necessary to give a clear understanding of the invention. The Work' support of the machine is indicated at l, the presser-foot at 2, the curved. hook needle at 3, and the ewl at 4-. The presses foot is actuated in suhstantiallythe same manner during the sewing operation osin the chine illustrated and described in the above patent. The presser--foot is. mounteclupon the upper arm of the'nresser-foot lever 5., which is pivoted upon the sti1d-6,- andthe .presser-foot is aetuetedduring the M operation of the machine by'iheohs'inism connected by a link/7 Wnfh the -,'ower e rzn of the presser-foot leve lhiring. each cycle of. operations, Startling immediately utter the ork has been fed, the presser-fQot-is moved into engagement with the-work, 1s

held with at light spring pressnreegeinst the Work, is depwssedpositivelye predew termined distance, is locked in depressed position, and is then unlocked and raised from the work. The mechanism for actuating the presserfoot in this manner comprises a pivoted lever supported upon a movable fulcrum 9 and connected by the link 7 with the lower arm of the presserfoot lever. The presser-foot is moved into engagement with the work and is pressed lightly against the work by means of a tension spring 10 attached at one end to a pin 11 projecting from an angularly adjustable rod 12 and having its other end connected by a link 13 with the lower end of the lever 8. The presserfoot is pressed down positively against the work a predetermined distance and is lifted from the work by the action of a lever 14 pivoted on a stud 15, the lower end of which is connected by a link 16 with the upper end of the lever 8. The fulcrum 9 for the lever 8 is carried at the forward end of a longitudinally movable fulcrum bar 17 which moves in guides in the arms of a yoke 18. The fulcrum bar is unlocked so that it can move longitudinally when the pressenfoot is moved into engagement with the work and while it is pressed lightly upon the work by the spring 10 and is locked during the action of the lever 14. to depress the presser-foot positively against the work and to lift it from the work. The fulcrum bar is provided with a series of screw threads 19 of steep pitch, and a nut 20 is threaded on the fulcrum bar and arranged between the arms of the yoke 18. When the nut 20 is free to rotate on the fulcrum bar, the fulcrum bar is free to move longitudinally through the yoke. The

fulcrum bar is locked against longitudinal movement by locking the nut against rotation on the bar. The nut is locked against rotation to lock the fulcrum bar during each cycle of operation, by means of a lever 21, pivoted at 22 on the yoke and carrying a roll 23 for engagement with the periphery of the nut. The roll 23 is mounted on the lever 21 between the nut and the axis of the lever at a point such that the distance between the axis of the lever and the nut-engaging face of the roll is slightly greater than the distance between the axis of the lever and the nut. hen the lever 21 is swung toward the rear of the machine, the roll 23 will wedge against the periphery of the nut and thereby securely hold the nut from rotation. The upperend' of the lever 21 is connected by a link 24 with the arm 25 of a lever 25-26 pivoted on a. shaft 27. A rod 28 is pivotally connected with the end of the arm 26 and is arranged to move through a guide in a block 29 on the frame. The lever 25-26 is turned ab ut the shaft 27 in a dircction to swing the lever 21 to the rear,

and lock the nut on the fulcrum bar by the action of a coiled spring 30 surrounding rod 28 and interposed between the block 29 and a collar on the rod so that it acts to lift the rod and the arm 26 and swing the arm 25 and the lever 21 toward the rear of the machine. The lever 25-26 is turned in the opposite direction to swing the lever 21 forwardly and unlock the nut 20 so that the fulcrum bar may move freely through the guides in the yoke 18 by the actuation of a lever 31 pivoted on the shaft 27 which carries an abutment screw 32 arranged to engage the upper face of the arm 26 of the lever 25-26. When the lever 31 is swung downwardly about the shaft 27, it will swing the lever 2526 in a direction opposed to the action of the spring 30. is actuated to unlock the nut on the fulcrum bar during each cycle of stitch forming operations by a cam lever 33' also pivoted on. the shaft 27 and provided with a cam roll 34 acted on ,by a cam carried by the cam shaft of the machine. The hub pf the lever 33 is provided with a shoulder which, when the lever 33 is swung to the right (Fig. 1) engages a shoulder 36 on the hub of the lever '31, thereby swinging the lever 31 downwardly about the shaft 27.

To enable the presser-foot to be unlocked and lifted after the machine has been stopped or upon stopping the machine at a point in a cycle of operations when it is normally locked firmly in work-engaging position, a lever 37 is pivoted upon the stud which supports the presscr-foot lever and is provided with a roll 33. mounted upon the end of its loweri arm, which is arranged to engage behind the lower arm of the presscrfoot lever 5 when the upper arm of the le-- ver 37 is swung rearwardly. The upper arm of the lever 37 is connected by a link 38" with the upper arm 39 of a lever 39-40 fixed upon a"stud 41 moimted to turn in hearings on the frame. The end of the arm 10 is formed with a cam face 42 which is arranged to engage a roll 43 carried by the lever 31. The connection between the lever 31 and the lever 33 permits the lever 31 to be swung. downwardly about the shaft 27 independently of the lever The forward portion of the cam face 42 is sharply inclined to the path of the end of the ill'm 40 while the rear portion of said face is substantially concentric with the path of the end of the arm so that as the arm 40 swingsfor'wardly the roll will be depressed and the lever 31 swung downwardly to unlock the nut on the fulcrum bar by theena'agement of the inclined portion of the cam face 42 with the roll 43 and when the roll reaches the portion of said face whichis concentric with the path of the end of the arm 40 the further movement of the arm will not affect the lever 31. The parts are so constructed and arranged that as the upper arm of the lever 37 and the arm 39 of the lever' 39-40 ess e y I I e are s vung rearwardly the lever-El is first "it-is released not only discfonneets the main j actuated to unloclr then t en thefulcrum shaftofvthe machine from the main driving bar'by the e ngagement of thetorward in shaft-located in the base thereof, but alsd clinedl portion'of the cam' face-42 with the throws into operation mechanism by which roll '43and after the portion of-said face the main shaftis'slowed dov vn to a'prede- 70 which is concentric with the-path ofmove termined slow speed then driven at slow. ment of the end of the arm 40 reaches the speed ina forward direction and finally roll 43 the roll 38 engages the rear side of stopped at a predetermined point in a cycle fthe leverarm of the presser' foot lever and of operations The mechanism for slowing the presser-foot is then lifted by the condown the shaft and for driving it at slow #5 tinued movement of the lever 37.- The speed comprises a friction clutch consisting "qpresser-foot may be unlocked and lifted by of a driving friction clutch member 58 i theoperator by amanual manipulation of loosely mounted on the main shaft 4L9, which the lever 37 which serves as a hand lever or isconstantly driven at a predetermined slow the parts may be automatically actuated to speed in a forwerddirection and'a cooperat-- unlock and lift the presser-foot as hereining driven friction clutch member 59 mountwafter described. When the parts are re ed on the shaft 49 to rotate with the shaft.

" leased, the presser-foot is brought down A spiral gear 60 is formed integral with the upon the Work by the actionof the spring clutch member 58 and said clutch member is to their normal positions by the coiled ing With said gear. The spiral pinion 61 is spring 4 1. henthepresser-foot is descendmounted up'bn a shaft '62 Wl1l3l1 carries a ing the rollfii doesnot leave the portion of pulley 63 and i the shaft 62 is constantly the cam face 42 which is substantially condriven from the pulley 56 by means of a 25 eentric with the path of movement of the belt 64- passing about a pulley 65 formed on end. of the arm eLO-until the pressenfoot is the hub of the pulley. 56 and about the pulengaged ,With the Work. It. is, therefore,- ley 63. The clutch member 59 is secured to a impossible. for the spring 301:0 act to lock sleeve 66 which is free to slide longitudinally c the presser-foot untila the presser-foot has of the'shaft 4-9 but is connected to rotate Lmoved into workrengagingposition.- -'.With the'shaft by means of a block 6? so y The machine is driven during the seWing' cured in the pulley z i, the inner end of operation from a main' driving shaft -15 which is engaged betweenlugs 68 projecting journaled in. bearings in the base of the maoutwardly fromthe sleeve'66. The sleeve'66 chine by means of a belt 46 passing about a is normally maintained in a position such I 3 pulley 47. which is arranged to bedriven thatthe clutch member59 is disengaged from a through-driving connections from the main the clutch member 58 by means of a coiled driving shaft and about a pulley48 secured spring 69 seated in a recess in the block 67 to the end of the main shafted) of the maacting against the head of a pin or bolt 70' i chine. The pulley L7 is connected through slidably mounted in the block 67 and haw lll'and the levers 37 and 39%0 are returned driven by means of a spiral pinion ,61 mesh- 85 t lintenneshing beveled geersfiO with a sleeve ing a plate 71 secured to its inner end which .51 mounted on the main driving shaft engages the in er faces of the lugs 68. I

to which sleeve is secured one member 52 of "When the In mbers of the slow speed fricthe main driving clutch. The other member tion clutch are engaged they first act as a 53 of the main driving clutch is mounted to friction brake to slow .dowii the speed of the rotate ,With the main driving shaft, and is main shaft of the machine until it is rotat- 1110 movable longitudinally of said shaft into ingvat the speed of thefslow speed driving and out ofengagement with theclutch memclutch 1nember,.after which the main shaft-is ,ber 52. The engagement of the clutch meindriven. at slow speed in a forward direction 5 5119152 is controlled by a clutch operating until the machine is brought to stopping "speed dependingupon the pressure applied .mined pb'int in thefrotation of the main achine is thereby disconnected from he termined interval fatter the engagement of 0; driving shaft 45. The shaft 45 is driven the clutch members, so that the shaft 1s alzl76f1'53 with the cotiperating clutch xylem-by the slow. speed driving clutch member 1'5 l edge 54 which is connected with and. ac positionwhen the members of the slow speed tuated from the treadlei When the clutch are disengaged and the rotation of', treadlc is depressed the cltltch members are the main shaft is stopped. The clutch meinengaged and themachine is driven ata bars 58 and 59 are engaged at a predeter-"l-zo to the treadle by theoperatort, When the shaft ofthe machine andthe said clutch treadle is released the clutch members are members are disengaged and-the rotat on of disengaged andfthe main shaft 49 of the the shaft arrested (at theend of a predefrom the power shaft by means of 'a belt ways slowed down and its rotation finally J passing about a puley 56 fixed upon the arrested'm a uniform manner. The mechashaft 45. 57 indicates a, loose pulley mount. iiism for engaging and "disengaging .the ed upon the shaft 45. clutch members 58 and 59 at predetermined The upward movement of the tread'le points in the rotation of the shaft comthe arm of the bell crank lever b prises a timing cam consisting of a cam groove 72 formed in the sleeve 66 in which engages a cam roll 73 carried by one arm of the bell crank lever 74 pivoted in a stud 75, the other arm of which is provided with a recess 76 arranged to receive the head of a locking pin 77. The locking pin 77 is mounted to slide vertically -in the rear end of a slide 78, and is moved upwardly in said slide into engagement with the recess. 76 in a coiled spring 79. The slide 78 is provi ed with a reduced extension 80 arranged to slide throu h an adjustable sleeve 81 threaded into t 1e frame. The rearward movement of the slide 78 is limited by a stop nut 82 which engages the end of the sleeve 81 and the slide is held in normal position in the frame by means of a coiled spring ,83 surrounding the reduced portion of the slide and interposed between a shoulder on the slide and the inner end of the sleeve 81... By adjusting the sleeve 81 the slide 7 may be adjusted so as to bring the locking pin into position to register with the rece s 76 in the arm of the bell crank lever at the proper time in a cycle of operations and by adjusting the nut 82 the tension of the spring 83 may be varied.

The locking pin is controlled from the treadle so that when the treadle is depressed and the main driving clutch in the base of the machine is engaged to drive the machine, the locking pin is held down out of engagement with the recess 76 and the hell crank lever 74 is then oscillated idly by the cam 72. When the treadle is released and rises to disconnect the main shaft of the machine from the main driving shaft, the locking pin is engaged with the recess 76 and the hell crank lever is thereby locked to the slide 78. When the bell crank lever 74 and the slide 78 are. thus locked together the cam 72 acting upon the roll 73 will force the sleeve. 66 longitudinally of the shaft 49 in the direction to bring the clutch member 59 into engagement with the driving clutch member 58. The force with which the slow speed clutch members are engaged will depend upon the tension of the spring 83 and this may be adjusted so that the shaft will be slowed'down to the speed of the slow speed driving clutch member and will be driven by said member in a forward direction be fore the slow speed clutch members are disengaged and the rotation of the main shaft is arrested. mechanism coiiperating therewith act to bring the clutch members 58 and 59 into engagement at a definite point in the rotation of the shaft. \Vhen the shaft has been slowed down to the slow speed of the slow speed driving clutch member and while it is driven at slow speed by said member the continued rotation of the cam 72 will cause The. timing cam 72 and the 85 of a three-armed lever 86 ivoted 'upon a stud 87. This lever is provir ed with a second arm 88, upon the end of which is mounted a roll 89. The locking pin is held down out of engagement with the recess 76 intlio:

arm of the bell crank lever, while the treadle is depressed andthe main driving clutch in the base of the machine is engaged by, the engagement with the roll .89 of a curved face 90 formed upon the out-er end of an arm 91 pivoted on a stud 9'2 and connected with the forward end of the treadle by means of a rod 93. The curved 'face is formed substantially concentric with the pathof movement of the outer end of the arm 91 so that the movements of the treadle in producing variations in the speed of the machine will not affect the position of the locking pin. When the treadle is released and rises, the arm 91' is swung u wardly to disengage the outer end thereo from the roll 89 and the locking pin is then forced upwardly in the slide 78 by the spring 79 into engagement with the under side of the arm of the bell crank lever and when the recess 7 fi'registers with the head of the in, the pin snaps upward into the recess. ig. 4:.shows clearly the position of the parts when the treadle is released and the machine is at rest. When the treadle is depressed, to start the machine, the outer end of the arm 91 engages the roll 89 and swings the three armed lever 86 to disengage the pin is disengaged from the recess 7 6 before the main driving clutch is engaged, and the continued downward movement of the treadle to engage the main driving clutch brings the curved face at the outer-end of the arm 91 into engagement with the roll 89.

To enable the main shaft to be rotated manually whenever it is desirable, the outer end of the arm 91 is formed with a locking recess 94: to receive the roll 89 and lock the arm from upward movement at a time when the locking pin is disengaged from the re cess in the arm of the bell crank lever and when the members of the main driving clutch are disengaged.

The mechanism for lifting the presserfoot upon stopping the machine comprisefl a lever 95 mounted upon a rocking sleeve 98" arm 99 which is connected by a'link 100 me ses machine so that the lever 95 is arranged to swing upon an axis substantially"parallel.

with the axis of said shaft. A cam 98 is mounted on the main shaft 19 of the machine to engage the outer end of the lever v 95 and swing said lever and the sleeve 96 on which it is carried to the left, Fig. about the stud 97. The sleeve 96 carries an with the arm 101 of a. lever ,102 pivoted upon a stud 103. The pin or bolt which connects the link 100 with the arm 101 is provided with an extension on its head' to engage a stop screw 105 mounted on an arm 106 fixed to the shaft 11. lNhen the lever 95 is actuatedby the engagement of the,

cam 98 therewith, the arm 106 and shaft 4-1 will be actuated to swing the lever 39 10' in a direction to unlock and lift the presseiffoot.- t

The lever-95 is actuated by the cam 98 as the shaft is executing its final forward movement just before it is l'Vhile the treadle is depressed to maintain the main shaft of the machine in driving connection with the main dri ing shaft in thebase of the machine; the lever 95 is held 7 out'of the path of the cam and removed into the pathof the cam as thetreadle is released and. rises to throwinto action the mechanism for slowing down the shaft and driving it forward at slow specd'to stopping position: To enable the lever 95 to be moved into and out of the path of the cam." seid lever is pivotallv connected with the sleeve 96 by pivot pins 107' secured in arms on the lever 95 and arranged at right angles to the axis of the sleeve, the inner ends of which engage in cylindrical sockets in the sleeve 96. The lever 95 is provided with a laterally extending arm 108, the end of which projects forwardly at angle to the main portion thereoi across the end of the stud 97 and carries an abutment screw 109 arranged substantially in line with the axis of the stud. The lever 95 is maintained out of the path of the cam 98 when the machine is running normellv by the engagement of an arm 110 of the three armed lever 86 with the end of the sore/W109. When the treadle is depressed theibree-armed lever 86 is actuated by the engagementof the arm 91 with the roll" 89 to lift the mm 110 and swing the lever 95 about the pivot pins 107 so as to place the end'of the lever at one side of the path of the cam 98, and the lever 95 is held in this position 'while the roll 89 is engaged with the curved face of the outer end of the arm 91. When the 'trcadle is released. and rises to release the arm 91 from the roll and the locking pin rises under the influence of the spring 79, the arm 110 of the th rec-armed lever is depressed and the lever 95 is swung into the path of the'cam 98 by a springlll connected at one end brought to rest. 1

with the arm 108 of the lever. The arm 99 is provided with a shoulder 112 which engagesthe rear side of the lever 95, thereby I taking I The movementof the shaftjis'finally arrested by the engagement of a the strain from the pivot pinsz107" when'the lever. 95 is actuated by the cam 98..

projection or lug 113, carried by the main shaft-4C9, with arranged in the plane of rotation of the cam 98 SO that the movement of the lever 95*to" theend of the arm 95. This projectionis carry it into and out of the pathof inseam Will also carry the lug.

operation with the lever 95 as a friction brake and t positivestop to slow dbwnand it 111130 and 0111'; of th The cam 98 and lug 113'act in 0;

stop theinain shaft-oi" the machine in a 'predetermined position.

To further check the rotation of the shaft" before the lug' 113 engages theend of the 0nd arm lever 95, the lever 1:02 is provided with a sec- I 114 WlHCli carries an abutment screw 115 101* engagement with the arm 116 of a bell crank lever pivoted onvthe'stud T5.

The other arm 11? of this bell crank curries ner face of the pulley 18.

ment screw the end of the arm 1143 engages t'he arm 1160f the bell crank 116-417 n a brake shoe 118 arranged to engage the in:

.When vthe lever is actuated by the cam't'o swing the arm; 101 of the lever 102 to the rear, the ab tand the hell crank is actuated to engagethe brake shoe 118 with the pulley .48.. In order that there may be-very little;r'e'- sistance to'the lateralswinging inoven entof the lever 95 to carry said lever out of-the path of cam 98 and'lug 113 when the treadle is depressed so that the machine may be of" the pressei 122 which engages in'front of an extension 0f the head on the pivot pin latch is moved, forward to jection 122 in front of the hea'd oft the pin 104 by the actionof theforce v of gravity on said When the lever is swung about the pivot pins 107 to locate,

the end of the lever out of the path of the cam 98 and lug 113, the latch is disengaged from the extension onthe head of the pin 10 1 to allow the presser-foot to descend upon the started with -a comparatively light 19113531113; 1

98 and the lug 113 sothat" H been actuated by the cam-.to lift 104.11 horizon-t tal arm 123 is fixed to the stud 121 and th engage he prQ-n extension o'nf-ith z .120

e position'so that not drop into the 4 fixed upon a fulcruin stud 121 and having a catch projection I work by the engagement of the upper face'of a laterally extending lug 125 on the arm 108 of the lever'ilfi with an abutment screw 126 mounted in the offset endof the 'srm 123. use

The driving and stopping mechanism described above is made the subject matter of a chine illustrated the tension is released as the resser-foot is lifted upon stopping the machine and is restored when the resser descends u on the work as the mac ine is started. he horizontal arm 129 of the lever 102 is connected by means of a cord 130 with the bell crank 128. The cord 130 passes through a flexible sheath 131, the ends of which are attached to the frame of the machine. When the arm 101 of the lever 102 is moved to the rear to lift the presser-foot the lever 128 is actuatedto release the tenbeing lifted.

sion. When the arm 1010f the lever 102 is released and swings forward to allow the resser-foot to descend on the work the lever 128 is released and the tension is restored by the spring 127.

Having explained the nature and object of the invention, and s ecifically described a machine embodying the same in its pre ferred form, what is claimed is:

1. A shoe sewing machine, having, in combination, stitch forming devices, a work sup port, a presser-foot, mechanism for actuating the presscr-foot, comprising a pivoted lever, a movable fulcrum for the lever, a spring for locking, and means for unlocking, the fulcrum during each cycle of operations, and means for unlocking the fulcrum and lifting the resser-foot when the presserfoot is normally locked in work-engaging position to allow the work to be removed or adjusted, having provision-for preventing the locking spring from acting until the Presser-foot has descended on the work after 2. A shoe sewing machine, having, in comb nation, stitch forming devices. a work support, a Presser-foot, mechanism for actuating the presser-foot comprising a. pivoted lever, a movable fulcrum for the lever, means for locking and unlocking the fulcrum during each cycle of operations, and means for unlocking the fulcrum and lifting the Presser-foot when the presser-foot is normally locked in work-engaging position to allow the Work to be removed or adjusted having provision for rendering the locking means inactive. until the presser-foot has descended on the work after being lifted.

r 3. A shoe sewing machine, having, in combination, stitch forming devices, a work support, a presser-foot, means for locking and unlocking the Presser-foot during each cycle of operations, and means for unlocking and lifting the presser-foot when it is normally locked in work-engaging position to allow the work to be removed or adjusted, comprising a roll carried by a part of the looking mechanism, and a pivoted lever having a cam face arranged to engage said roll and move the same in a radial direction relatively to the lever to actuate the locking mechanism to unlock the Presser-foot.

4. A shoe sewing machine, having, in combination, stitch forming devices, a work support, a presser-foot, mechanism for actuating the presser-foot comprising a pivoted lever, a movable fulcrum for the lever, means for locking and unlocking the fulcrum during each cycle of operations, and means for unlocking and lifting the presser-foot when the presser-foot is normally locked in workengaging position to allow the work to be removed or adjusted, comprising a roll carried by the locking mechanism, and a pivoted lever having a cam face to engage the roll and actuate the locking mechanism to unlock the presser-foot.

5. A shoe sewing machine,-having, in c01n- 'bination, stitch forming devices, a work-support, a presser-foot, mechanism for actuating thepresser-foot during each cycle of operations comprising a pivoted lover, a movable fulcrum for the lever, means for locking and unlocking the fulcrum during each cycle of operations comprising a locking member, a member for actuating the locking member to unlock the fulcrum mechanism connecting the locking member with the actuating member, and means for unlocking and lifting the resser-foot when it is normally locked in worlccngaging position to allow the work to be removed or adjusted comprising a third member arranged to actuate the locking member connecting mechanism.

6. A shoe sewing machinc,-having, in combination, stitch forming devices, a work support, a prcsser-foot, a spring for locking the [)1'0s--Ll'-f()0li and means for unlocking it during each cycle of operations, and means for unlocking and lifting the presser-foot when it is normally locked in work-engaging position to allow the work to be removed or ad usted, having ,provision to prevent the locking spring from acting until the presserfoot has descended on the work. after being lifted.

7. A shoe sewing machine having, in combination, stitch forming devices, a work sup. port, presser-foot, a spring for locking the presser-foot and means for unlocking it during each cycle of operations, and means for unlocking and lifting the presser-foot through said port, a pressei foot,

, from the axis when it is normally locked in work-engaging I .vent the locking spring from acting until the presser-foot has descended on the work after being lifted and'comprising a roll carried by the locking mechanism, and a .pivoted lever having a cam face to engagesaid roll and actuate the locking mechanism to unlock the presser-foot. i

8. A shoe sewing machine, having, in combination, stitch forming devices, a work supmechanisin for locking and unlocking the presser-foot during each cycle of operations. comprising'a able fulcrum bar, the bar, movement endwise-wviththe bar, a locking lever-for the nut having a contact piecefor engagement with the nut arranged so that its nut-engaging face is slightly farther a locking nut threaded on between the axis of the lever and the nut,- and means for actuating the' lever to Wedge the contact piece against the "nut andhlocke the not on the fulcrum bar. '9.'A shoe sewing machine, having, in

combination, stitcli forming devices, a work" support, a presser-foot, means forlocking and unlocking the-presserioot during each cycle of operations," lever, a movable fulcrum therefor, a movable fulcrum bar, a nut-threaded on thebar, means for restraining the nutfrom move merit endwise with the bar, and wedge-act .ing means for locking the nut from rotation on the bar to lock thepresser-foot.

10. A shoe sewing machine, having, in com= bination, stitch-forming devices, a presserfoot, a main shaft, driving mechanism there for, a cam driven by the shaft, connections between the 'cam and the presselqfoct for lifting the' presser-foot from the cam com-. prising a member normally out of operative relation with the cam and movable transversely of the plane of movement of the cam into operative relation therewith, m e'ans under the control of the operator fordisconnecting the driving mechanism front the shaft and moving said member into operativerelationwith the cam so as to cause the resser-foot to be raised by the 'operatioh of thecam as the main shaft is stopped, means for holding said member out of contact withthe cam after the p'resser foot has been raised, and means for moving said member out of the path of the machine' i 11-; A shoe sewing machine, having, in combination, stitch-forming devices, a resserfoot, a main shaft, driving mechanism there-1 for, a cam driven by, the shaft, means for stopping the rotation ofthe main shaft,

masses pivoted, lever, a movable fulcrum therefor, a mov- 'bination, means for e'straining the nut from comprising a, pivot-ed,

, mg mechanism into the path 'ofthe cam upon starting the erative position with lifted and the ten comprising a member normally out of op-. erative relation with the cam and movnble transversely of the plane of movement of the cam into the path of the cam, means underthe control of the operator for disconnecting the driving mechanism and inovmg said member'into operative relation with the cam to raise the presser-foot from the means for holding thepresser-foot in it is raised-by the cam cam, the position to which and means for moving path of the cam upon with. said member,

said member out of the startingthe machine.

'12. Ash

foot, a main shaft, driving mechanism there for,ia tension device, mechanism for lifting the presser-foot and actuating the tenslon device to release the tension" as the main shaft is stopped, comprising a camv of the lever than the distance,

driven by ithe shaft, a member-arranged to and out of thepath v 7 mechanismfor stopping the driving shaft after the cam hasmoved out of engagement so oe sewmg machine, hav ng, n con "stitch-forming dev1ces,a presser- V of the cam andfnor mally' held out of operative relationi'w th' [the cam during the sewing operation, con' .necting mechanism between said member and presser-foot and between said member of the operator for, disconnecting the a e,

to lift thepresser-foot and release theften sionas the driving'shaftis -stopped,"means for holding the presser-foot lifted and the tension released means for moving said member out of the path of the .ca'm and tripping said holding" means to allow the pressier-foot to descend a I to be restored on the work and thetension upon starting this machine; 13. A shoe sewing machine, having, in combination, stitch-forming devices, a presser foot, a tension device, mechanism therefor, means for rotation of the shaft comprising a cam, and a'stop carriedby the;

the cam to lift the tension and td be-.,engaged by the stop to shaft, a member arranged to be actuated by presser-foot to release the 20i" and the tension device, means under control moving said member cam to cause the cam after the cam has moved out of engagement with said -member, and 3 stop the rotation of the shaft mounted for movement transversely of the plane of rota.'-.

tion of-lthe cam and stop into and out of the;

paths thereof, and normally held out of oprelation thereto, means underfcontrol of the operator for disconnecting the driving mechanism said member into the paths of stop, a'la-tch for holding the 'on released after the can] and moving the cam and presser-foot E has moved out of engagement with said meniber, and means for moving said member out of the )aths'of the cam and stop and for trip ing the latch to allow the presser-foot to dl scend upon the work and the tension to be restored upon starting the machine.

it. A shoe sewing machine, having, in combination, -stitch-forming devices, a 'presserfoot, a main shaft, high speed driving mechanism for the shaft, a treadle for controlling the connection of the shaft with the high speed driving mechanism, a slow speed clutch comprising a drivin clutch member and a drivenclutch mem er connected to rotate with the shaft, a cam carried by one of the clutch members, a clutch operating lever actuated by the cam, a locking pin for rendering the clutch operating lever active to bring the clutch members into engagement when the shaft is disconnected from the high speed driving mechanism, means for controlling the engagement of the locking pin with the clutch operating lever comprising a second lever, a c0nnection between the second lever an the locking pin, a roll carried by the second lever, a pivoted arm for engagement with the roll to actuate the second lever having a curved face for contact with the roll to hold the locking pin out of engagement with the clutch operating lever, a connection between said arm and the treadle for actuating the arm from the treadle, and resser-foot lifting mechanism controlled from the locking pin and acting automatically to lift the resser-foot as the main shaft is brought to rest.

15. A shoesewingmachine,having,in combination, stitch-forming devices, a presserfoot, a main shaft, positive stopplng devices for arresting the rotation of the shaft at a predetermined point in its rotary movement, means for checking the rotation of the shaft before it is finally arrested by said devices, comprising cooperating friction brake members, means forlifting the presserfoot as the rotation of the shaft is arrested, and common means for actuating the presserfoot lifting mechanism to lift the presserfoot and for operating the brake mechanism to bring the brake members into engagement.

16. A shoe sewing machine, having, in combination, stitch-forming devices, a Presserfoot, a main shaft, driving'rnechanism therefor, a cam driven by the shaft, connections between the cam and the presser-foot for lifting the presser foot from the cam, comprising a member normally out of operative relation with the cam and movable transversely of the plane of movement of the cam into operative relation with the cam to lift the resser-foot by the operation of the cam as t e main shaft is stopped, a latch for holdin the presser-foot in lifted position after t 1e cam has moved out of engagement with said member, and means for disengaging the latch'to allow the resser-foot to descend upon the work and to move said member out of the path of the cam upon starting the machine.

17. A shoe sewingmachine,having, in combination, stitch-formin devices, a, presserfoot, a main shaft, driving mechanism therefor, a cam driven by the shaft, connections between the cam and the resser-foot for lifting the presser-foot from the cam comprising a member normally out of operative relation with the cam, and movable transversely of the plane of moven'ient of the cam into operal ive relation therewith, means under the control of the operator for disconnecting the driving mechanism from the shaft, and moving said member into operative relation \Vltl the cam to raise the presser-foot by the operation of the cam as the main shaft is stopped, means for holding the presser-foot in raised position after the (arm has moved out of engagement with said member, and means for moving said member out of the path of the cam and for causing said holding means to release the Presserloot and allow it to descend on the work upon starting the machine.

FRED ASHWORTH. Witnesses:

Gnns'rna E. Rooms, RUTH E. WARD.

Corre'iign in Lette s PatentN0.1, 23,539.

It is hereby certified that in Letters Patent No. l,233, 539,- g ra ted July 17,

' that the eame may eonform to the record of the case in the'Patent Officei jl Signed and sealed this 14th day of August, A, D.) 1917. I I

' h I "R. F;- WHITEHEAD,

[emu] 1917, u zon :the application 'of Fred Ashw orth, of Beverly, Massachusetts, forts m hi mprovement in Sewing-Maehines," errors appear in the printedepe'cificetiqhi requiring correctieh as fellows: Page 5, lihe 28, for the word frex tipw 'ed rc ad moved; same pztge, line 116, for the words of the head oh read enflte and that the said Letters Patent should b'e Tea d with these corfeetion s therein 

